Lock Washer, Cup, Full Washers, Flat Washers, Form A
Steel, TPE, Vulcanised Fibre, Nylon, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
25 mm, 12.5 mm, 2.2 mm, 4.36 mm, 6.5 mm
0.7 mm, 0.6 mm, 8.1 mm, 0.16 mm, 2.5 mm
M6, M5 (Form A), M12, M2.5, M5
BS 4320:1968, ASME B18.22.1
ASTM F844, ASME B18.8.1, BS 4320B, DIN 7603A